Mary mix white paint and blue paint in the ratio of 2:3.she makes a total of 20liter of paint. How much more blue paint does she need to add the mixture so that the ratio of white paint to blue paint becomes 1:7

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

Square a has a side length of (2x-7) and square b has a side length of (-4x+18). how much bigger is the perimeter of square b than square a?and show all work! you so